# class
class MathCalc:

    # 属性  + 函数
    def add(a, b):
        return a + b

    def less(a, b):
        return a - b

    def mutil(a, b):
        return a * b

    def devide(a, b):
        return a / b


if __name__ == '__main__':
    print(MathCalc.add(1, 2))
    print(MathCalc.less(2, 1))
    print(MathCalc.mutil(2, 2))
    print(MathCalc.devide(3, 4))
